This can be considered as a bugfix ("Cannot use openvpn2 as OpenVPN
Cloud connector") so could go into release/2.5 too.
ke 10. marrask. 2021 klo 12.59 Lev Stipakov (lstipa...@gmail.com) kirjoitti:
>
> From: Lev Stipakov <l...@openvpn.net>
>
> When /30 subnet is pushed (like in the case of OpenVPN Cloud),
> DHCP server address is calculated to be the same as local address,
> which causes collision and therefore connection is not established.
>
> To fix that, use openvpn3 approach, which sets DHCP server
> address to a network address for small subnets
>
> Signed-off-by: Lev Stipakov <l...@openvpn.net>
> ---
> src/openvpn/tun.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c
> index 28f803ec..994e3751 100644
> --- a/src/openvpn/tun.c
> +++ b/src/openvpn/tun.c
> @@ -6363,7 +6363,9 @@ tuntap_dhcp_mask(const struct tuntap *tt, const char
> *device_guid)
> }
> else
> {
> - ep[2] = dhcp_masq_addr(tt->local, tt->remote_netmask, -1);
> + int prefix_len = netmask_to_netbits2(tt->adapter_netmask);
> + /* use network address as DHCP server for small subnets,
> otherwise last address before broadcast */
> + ep[2] = dhcp_masq_addr(tt->local, tt->remote_netmask,
> prefix_len < 28 ? -1 : 0);
> }
> }
> else
> --
> 2.23.0.windows.1
>
--
-Lev
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